Improved imitation-stone for building-purposes



QV mafee cv A @ammi i m THOMAS FNHAMILTON, OF NEW HAVEN, CONNECTICUT.-

Letters Patent No. 84,822,

dated December 8, 1868.

IMPROVED IMITATION-STOYNE FOR BUILDING-PURPOSES.

The Schedule referred to in these Letters Patent and making park of thesame.

To all whom 'it may concern Beit known that I, THOMAS F. HAMrL'roN,of-New Haven, in the county of New Haven, and State of Connecticut, haveinvented a new Imitation-Stone for Building-Purposes; and I do herebydeclare the following, when taken in connection with the accompanyingdrawings, and the letters of reference marked thereon, to be a full,clear, and exact description of the same, and 'whichsaid drawingsconstitute part of this specification, and represent, in

Figure l, a perspective view, and in Figure 2, a sectional view, of ablock manufactured in accordance with my invention. v

The object of this invention is to produce an article for window-sillsand lintels, and for other building-purposes, having finished surfaces,and at less expense than can be done in stone, yet equally as good forall practical purposes; and

The invention consists in forming such articles from hydraulic cementand sand, enclosing a blocl'; or' bar of wood, which gives strength tothe material.

Io enable others to construct my improvement, I will fully describe thesame, as illustrated in the accompanying drawings.

I iirst take a block or bar of wood, A, of the required length and sizefor Athe article to be produced, that is, a

This invention is specially adaptedto the construction of window-sillsandlintels, the surfaces of which vare planed, but is applicable alsofor other purposes.

'The wood not being exposed, will last for all time, and a block thusconstructed is nearly, if not quite, as strong as a block of the samedimensions of common brown-stone.

Having fully described my invention,

What I claim as new and useful, and desirefto secure by Letters Patent,is

The herein-described process for forming blocks with a wood foundationand cement covering, substantially as herein set forth.

i THOS. F. HAMILTON. Witnesses:

JOHN E. EARLE, A. J. TrBBrrs.

